Can this pump be fixed (vid)

Can this pump still be fixed or is it beyond hopeless? It still works, but is extremely loud (what's causing the loud noise?). Take a look at the quick video. It was already noisy, but it got worse over the weekend.
I don't see a way to embed the video, so just the link. I just uploaded, so hopefully it will show up already.vid

This post has been edited 2 times, last edit by "LarsB" (Jun 1st 2017, 9:03am)